It can be obtained from several places, for example as a part of MacTeX. Step – 1: With the r-base installed, you need to install RStudio. Download RStudio Desktop for mac from the RStudio… Click on the 'Download R for (Mac) OS X' link at the top of the page. GNU readline, Although Mac OS X comes with readline-replacement library, it lack some functionality like backward search etc. This is especially useful when new bad sectors are.